Alton | Bayliss XL Roof Vent Opener Piston Replacement Cedar Greenhouse Ready to Assemble: Carport arrives

Ready to Assemble: Carport arrives ready to assemble with pre-drilled profiles

Your plants get all the nourishing light they need without the damaging effects of harsh sun exposure

5 mph when properly assembled and anchored

Peaked roof with built-in vent to release smoke and let heat escape

From the roomy drawers built for weight to the sturdy lower shelf that’s just the right size for tools or storage baskets

Alton | Bayliss XL Roof Vent Opener Piston Replacement Cedar Greenhouse Ready to Assemble: Carport arrivesThe Bayliss XL Piston or Power Tube is a direct replacement component designed specifically for the Bayliss XL Automatic Greenhouse Vent Opener. If your current unit is no longer responding as it should, replacing the power tube is a simple and cost effective way to restore smooth, temperature driven vent operation. This tube contains a heat sensitive wax core that expands as temperatures rise and contracts as they fall, driving the piston that opens